Avista's top three insider shareholders as of September 29, 2026 are Dennis P Vermillion (Ceo, 180.56K shares), Dennis P Vermillion (Executive Vice President, 174.54K shares), Dennis P Vermillion (Ceo, 164.89K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Dennis P Vermillion | Ceo | 1,029,256 | 0 | 1,029,256 | 24.3% | 10 Mar, 2025 |
| 2 | Mark T Thies | Evp Retired | 675,674 | 0 | 675,674 | 16.0% | 21 Feb, 2024 |
| 3 | Heather Lynn Rosentrater | President Ceo | 391,953 | 0 | 391,953 | 9.3% | 03 Mar, 2026 |
| 4 | Jason R Thackston | Senior Vice President | 325,293 | 0 | 325,293 | 7.7% | 14 May, 2026 |
| 5 | Kevin J Christie | Svp, Cfo Treasurer | 306,443 | 0 | 306,443 | 7.2% | 03 Mar, 2026 |
| 6 | Scott L Morris | Officer/Chairman Of The Board | 253,839 | 0 | 253,839 | 6.0% | 02 Sep, 2026 |
| 7 | Ryan L Krasselt | Vice President | 239,895 | 0 | 239,895 | 5.7% | 03 Mar, 2026 |
| 8 | Gregory Curtis Hesler | Sr V President/Corp Secretary | 141,715 | 0 | 141,715 | 3.4% | 03 Mar, 2026 |
| 9 | Latisha Diane Hill | Vice President | 117,732 | 0 | 117,732 | 2.8% | 03 Mar, 2026 |
| 10 | James M Kensok | Vice President Retired | 87,739 | 0 | 87,739 | 2.1% | 21 Feb, 2024 |
| 11 | Bryan Alden Cox | Senior Vice President | 77,832 | 5,218 | 83,050 | 2.0% | 03 Mar, 2026 |
| 12 | Scott J Kinney | Vice President | 73,841 | 1,257 | 75,098 | 1.8% | 03 Mar, 2026 |
| 13 | Edward David Schlect | Vice President | 65,852 | 0 | 65,852 | 1.6% | 19 Jan, 2023 |
| 14 | Joshua D Diluciano | Vice President | 64,266 | 0 | 64,266 | 1.5% | 02 Sep, 2026 |
| 15 | Wayne O Manuel | Senior Vice President | 59,855 | 0 | 59,855 | 1.4% | 07 May, 2026 |
| 16 | David J Meyer | Other | 54,115 | 3,662 | 57,777 | 1.4% | 16 Jun, 2026 |
| 17 | Donald C Burke | Director | 36,086 | 0 | 36,086 | 0.9% | 02 Sep, 2026 |
| 18 | Scott Harlan Maw | Director | 33,429 | 0 | 33,429 | 0.8% | 02 Sep, 2026 |
| 19 | Heidi B Stanley | Director | 31,327 | 0 | 31,327 | 0.7% | 02 Sep, 2026 |
| 20 | Rebecca A Klein | Director | 31,272 | 0 | 31,272 | 0.7% | 02 Sep, 2026 |
| 21 | Janet D. Widmann | Director | 22,828 | 0 | 22,828 | 0.5% | 02 Sep, 2026 |
| 22 | Jeffry L. Philipps | Director | 20,977 | 0 | 20,977 | 0.5% | 02 Sep, 2026 |
| 23 | Sena M Kwawu | Director | 18,459 | 0 | 18,459 | 0.4% | 02 Sep, 2026 |
| 24 | Julie A. Bentz | Director | 16,852 | 0 | 16,852 | 0.4% | 02 Sep, 2026 |
| 25 | Kevin B Jacobsen | Director | 15,917 | 0 | 15,917 | 0.4% | 02 Sep, 2026 |
| 26 | Alexis G. Alexander | Vice President | 12,722 | 0 | 12,722 | 0.3% | 13 Mar, 2026 |
| 27 | Kristianne Blake | Director | 12,323 | 0 | 12,323 | 0.3% | 02 Sep, 2022 |
Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.
| Date | Insider | Position | Transaction | Shares | Price | Value | Shares Held After | Ownership |
|---|---|---|---|---|---|---|---|---|
| 01 Sep, 2026 | Rebecca A Klein | Director | Acquired A | 44 | $37.16 | $1.64K | 31,272 | Direct |
| 01 Sep, 2026 | Sena M Kwawu | Director | Acquired A | 44 | $37.16 | $1.64K | 18,459 | Direct |
| 01 Sep, 2026 | Janet D. Widmann | Director | Acquired A | 44 | $37.16 | $1.64K | 22,828 | Direct |
| 01 Sep, 2026 | Kevin B Jacobsen | Director | Acquired A | 44 | $37.16 | $1.64K | 15,917 | Direct |
| 01 Sep, 2026 | Julie A. Bentz | Director | Acquired A | 44 | $37.16 | $1.64K | 16,852 | Direct |
| 01 Sep, 2026 | Heidi B Stanley | Director | Acquired A | 44 | $37.16 | $1.64K | 31,327 | Direct |
| 01 Sep, 2026 | Scott Harlan Maw | Director | Acquired A | 44 | $37.16 | $1.64K | 33,429 | Direct |
| 01 Sep, 2026 | Jeffry L. Philipps | Director | Acquired A | 44 | $37.16 | $1.64K | 20,977 | Direct |
| 01 Sep, 2026 | Scott L Morris | Director, Other | Acquired A | 44 | $37.16 | $1.64K | 109,378 | Direct |
| 02 Sep, 2026 | Joshua D Diluciano | Vice President | Disposed S | 818 | $37.25 | $30.47K | 12,191 | Direct |
| 01 Sep, 2026 | Donald C Burke | Director | Acquired A | 44 | $37.16 | $1.64K | 36,086 | Direct |
| 02 Sep, 2026 | Joshua D Diluciano | Vice President | Disposed S | 3,857 | $37.24 | $143.63K | 8,334 | Direct |
| 15 Jun, 2026 | David J Meyer | Other | Disposed J | 45 | $40.98 | $1.83K | 3,662 | Indirect |
| 15 May, 2026 | David J Meyer | Other | Disposed J | 45 | $40.41 | $1.83K | 2,618 | Indirect |
| 14 May, 2026 | Jason R Thackston | Senior Vice President | Disposed G | 3,210 | $41.16 | $132.12K | 41,578 | Direct |
| 08 May, 2026 | Rebecca A Klein | Director | Acquired A | 3,538 | $40.98 | $144.99K | 31,228 | Direct |
| 08 May, 2026 | Heidi B Stanley | Director | Acquired A | 3,538 | $40.98 | $144.99K | 31,283 | Direct |
| 08 May, 2026 | Kevin B Jacobsen | Director | Acquired A | 3,538 | $40.98 | $144.99K | 15,873 | Direct |
| 08 May, 2026 | Donald C Burke | Director | Acquired A | 3,538 | $40.98 | $144.99K | 36,042 | Direct |
| 08 May, 2026 | Julie A. Bentz | Director | Acquired A | 3,538 | $40.98 | $144.99K | 16,808 | Direct |